No power loss light on 1987 caravan 2.5

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dmitchell - 18 Feb 2005 02:08 GMT

Without any preceding symptoms, it died. It will not start. But, I
noticed the power loss light will not come on. Does anyone have any
idea as to where the break in power to ignition system could be? There
is no spark, and I have tried another distributor, just to eliminate
that common problem. On other ones that the pickup plate died on, there
was no effect to the power loss light, and yes, the bulb is good.

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Daniel J. Stern - 18 Feb 2005 14:34 GMT

> Without any preceding symptoms, it died. It will not start. But, I
> noticed the power loss light will not come on. Does anyone have any idea
> as to where the break in power to ignition system could be? There is no
> spark, and I have tried another distributor, just to eliminate that
> common problem. On other ones that the pickup plate died on, there was
> no effect to the power loss light, and yes, the bulb is good.

Sounds like no power to the SMEC (engine control computer). Check your
fusible links (in the wiring harness upstream of the SMEC), check the 60-
and 14-pin connectors for corrosion, and if all of that checks out, find
and fix the faulty power and/or ground wire(s) to the SMEC.

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clemslay@iname.com - 19 Feb 2005 19:34 GMT

>Without any preceding symptoms, it died. It will not start. But, I
>noticed the power loss light will not come on. Does anyone have any

You likely have two problems:
Not running & corroded eyelets in the cluster PCB.

My 87 is very intermittent, CE can quit, low fuel
can flash opposite of the 4 way flashers, tach
can quit or peg. I need to remove my cluster
and resolder things, replace lamps, grease
cable, etc.

When you don't have spark, does your fuel
pump run?
Do you get the pump's grunt when you turn
on the ignition? (assuming it's been a while
since you last tried)
If you never have spark or pump action, check
the fuse links.
If yours (mid year change) has separate logic
and power modules your ASD relay is inside
the power module.
If yours has the SBEC, the ASD relay is on the
inner fender.
Does your tach show some speed while cranking
(if you have one)?

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dmitchell - 20 Feb 2005 19:01 GMT

I have no fuel pump running, no spark, and no power loss light. I think
it's a break in the power lead somewhere, but don't know where most
likely spot is. I'm gonna try to check out the pink fuseable link at
the ecm, but if that is intact, I don't know where to look next.

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dmitchell - 22 Feb 2005 00:07 GMT

I would like to thank all who responded to my problem. I got a complete
wiring schematic from my son's high school. With that, I was able to
trace the power leads and I found them all to be ok, so I checked the
grounds and found a bad ground wire connection. I am most appreciative
for all your concern and input.

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Dave Gower - 19 Feb 2005 20:23 GMT

> Without any preceding symptoms, it died. It will not start. But, I
> noticed the power loss light will not come on. Does anyone have any
> idea as to where the break in power to ignition system could be? There
> is no spark,

Coil or connections? Hall pickup or connections? Ignition computer (less
likely).

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